Ragost, Deft Gastronaut, Sam, Loyal Attendant, and Basalt Monolith

Prerequisites

• Ragost, Deft Gastronaut on the battlefield
• Sam, Loyal Attendant on the battlefield
• Basalt Monolith on the battlefield

Steps

1. Activate Basalt Monolith's first ability by tapping it, adding
2. Activate Basalt Monolith's second ability by paying , which is reduced due to Ragost making it a Food and Sam's reduction, untapping it
3. Repeat

Results

• Infinite colorless mana